Once upon a time, the government had a custom document storage and retrieval system built. They used it for a while, and then they boxed it up and put it in storage. Years went by. Then the government realized they needed those old documents. The people who had worked for the system had all left, and the company that wrote the software was no longer in business. So they handed the system off to a data recovery team, who worked on it for 18 months, to no avail.
Luckily, someone on the project ran in to someone who'd heard stories about me. Arrangements were made, and I was sent to where the system was waiting in boxes. In a single afternoon, I reassembled and configured the system, derived the necessary passwords, and got the software running and retrieving documents.